ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES [Abstract]
Accrued compensation	$ 18,532	$ 23,922
Goods and services received, not yet invoiced	3,478	3,457
Deferred revenue and customer advances	3,341	2,420
Warranty accrual	359	384
Income taxes payable	2,843	0
Taxes, other than income taxes	1,041	808
Other	3,144	2,113
Total	$ 32,738	$ 33,104